public class xiti2_5 {
  public static void main(String[] args) {
    long[] a = {1, 2, 3, 4};
    long[] b = {100, 200l, 300, 400, 500};
    b =a;
    System.out.println("数组b的长度："+b.length);   //代码1
    System.out.println("b[0]="+b[0]); //代码2
  }
}

